作　　者： ; ; ;

机构地区： 浙江海洋学院船舶与建筑工程学院

出　　处： 《中国造船》 2012年第A02期285-291,共7页

摘　　要： 海洋高桩的振动特性受到海洋环境的影响,采用分层模型建立了饱和土中高桩的竖向振动模型,通过分离变量方法,得到了高桩竖向振动频域解析解和时域半解析解。计算结果反映出高桩暴露段的存在对桩顶动力响应有明显影响,在土层自由表面出现附加共振和反射现象,共振和反射位置与上下桩段比有关。此外,当海床受到冲刷和波浪作用产生孔压积累时也会对桩顶的竖向振动响应产生一定的影响,研究的结果可以粗略的估计海床冲刷深度或波浪作用对海床的影响程度。 Marine environments have a major impact on the high pile at pile wharf. A resistant transfer model is applied to the analysis of pile vertical vibration. An analytical solution is deduced in frequency domain by means of variable separating method and then a semi-analytical solution is obtained using numerical convolution method. Numerical results from the frequency domain and time domain indicate that the exposure segment of pile has major effect on pile dynamic response. Resonance and reflection phenomenon appears at the soil layer interface and the location can be determined by the ratio of upper segment over lower segment of the pile in the frequency and time domain. Furthermore, there are some effects on dynamic responses at the pile top when the seabed immediately around the pile subjected to scour or build-up of pore pressure under the wave. A rough estimate of scour depth or influence depth of pore pressure under waves can be worked out.

关 键 词： 海洋工程 桩竖向振动 饱和土 孔压 冲刷

领　　域： [建筑科学] [建筑科学]